I had this problem too about a two weeks ago. And console getting spammed about missing player models. Restarting game/PC didn't work. But when i removed all my workshop content from my game and and unsubbed all content (I only had TDM Car addons) the player models suddenly worked again as they...
Damn it... It's because its one download only on this site. So when somebody downloaded it, it got removed from the site.
Didn't read that on the website.